Answer / manju

by using HashSet(Collection name)

Answer / edward sudhaharchennai

Unlike other implementations of the collection interface,
implementation of the Set intrface do not allow duplicate
elements. This also means that a set can contain at most
one null value. The set interface does not define any new
methods, and its add() and addAll() methods will not store
duplicates. If an element is not currently in the set, two
consecutive calls to the add() method to insert the element
will first return true then false...........

Answer / qim2010

Using HashSet class we can eliminate duplicates from and
array. Here is a simple example

public class ArrayRemoveDuplicate {
public static void main(String[] args) {
//
// A string array with duplicate values
//
String[] data = {"A", "C", "B", "D", "A", "B", "E",
"D", "B", "C"};
System.out.println("Original array : " +
Arrays.toString(data));

//
// Convert it to list as we need the list object to
create a set object.
// A set is a collection object that cannot have a
duplicate values, so
// by converting the array to a set the duplicate
value will be removed.
//
List<String> list = Arrays.asList(data);
Set<String> set = new HashSet<String>(list);

System.out.print("Remove duplicate result: ");

//
// Create an array to convert the Set back to array.
The Set.toArray()
// method copy the value in the set to the defined
array.
//
String[] result = new String[set.size()];
set.toArray(result);
for (String s : result) {
System.out.print(s + ", ");
}
}
}

Answer / gajendra

using hash map or treeset of collection framework

Answer / vijaya bhaskar teegala

use linkedHashSet.It will maintain the insertion order

Answer / elango boopathy

package com.sample.pack;

import java.util.ArrayList;
import java.util.List;

public class Duplicates {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int k = 1;
String[] str = { "abc", "123", "tyu", "xyz", "123", "m",
"abc", "abc" };
boolean isDuplicate = false;
List<String> list = new ArrayList<String>();

for (int i = 0; i < str.length; i++) {
for (int j = k; j < str.length; j++) {
if (str[i].equals(str[j].toString())) {
isDuplicate = true;
}
}
k = k + 1;
if(isDuplicate == false){
list.add(str[i]);

}
isDuplicate = false;
}
Object[] afterDuplicate = list.toArray();
for(int i=0; i<afterDuplicate.length; i++){
System.out.println(afterDuplicate[i]);
}
}

}

How can be define MARKER interfce in java

1 Answers  

What is the collections api in java programming?

0 Answers  

What is meant by class loader? How many types are there? When will we use them?

0 Answers  

Name the class that used to read objects directly from a stream?

4 Answers   Wipro,

What about main thread in java?

0 Answers  

How do you test a method for an exception using junit?

0 Answers  

To the class members how can we provide security?

1 Answers   Aspire,

What is qualitative variable?

0 Answers  

What is the top class of AWT event hierarchy?

5 Answers  

how come we know the object is no more used in the class?

2 Answers   Accenture,

In the below Java Program, how many objects are eligible for garbage collection?

1 Answers  

What is the use of arraylist in java?

0 Answers